Fig. 1
From: Endotracheal tubes and fluid aspiration: an in vitro evaluation of new cuff technologies
A high-volume-low-pressure cuff inflated to 30 cmH20 inside a 2.0 cm ‘trachea’. The blue dye is placed above the inflated cuff to demonstrate aspiration of fluid past the cuff. Despite inflating the ETT cuff to the correct tracheal wall pressure, it is only partially inflated with excess material folding and causing involutions. The blue dye highlights the formation of channels, which allow leakage of subglottic fluid into the lungs overhead view (a) and a lateral view (b)